[PATCH] D152417: [AArch64] Add pipeline model for Neoverse N1

[Evandro Menezes via Phabricator via llvm-commits]

evandro added a comment.

@dmgreen, indeed, the wider the machine, the less the benefits of specific scheduling are.  Yet, there may still be opportunities.  After all, even in these our days, performance critical code is still hand written in assembly, for many reasons, including optimal scheduling.

Anyways, I recorded these performance improvements using SPEC CPU2017:

- SPECspeed2017_int: +1%
- SPECrate2017_int: +1%
- SPECspeed2017_fp: +1%
- SPECrate2017_fp: -1%

I'm still investigating the one regression, by 2%, in `519.lbm_r`, but methinks that this patch is good enough for consideration.


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  https://reviews.llvm.org/D152417/new/

https://reviews.llvm.org/D152417